Constraints for nuclear gluon shadowing from DIS data

Abstract

The $Q^2$ dependence of the ratios of the cross sections of deep inelastic lepton--nucleus scattering is studied in the framework of leading twist, lowest order perturbative QCD. The $\log Q^2$ slope of the ratio $F_2^{\mathrm{Sn}}/F_2^{\mathrm{C}}$ is computed by using the DGLAP evolution equations, and shown to be sensitive to the nuclear gluon distribution functions. Four different parametrizations for the nuclear effects of parton distributions are studied. We show that the NMC data on the $Q^2$ dependence of $F_2^{\mathrm{Sn}}/F_2^{\mathrm{C}}$ rule out the case where nuclear shadowing (suppression) of gluons at $x\sim 0.01$ is much larger than the shadowing observed in the ratio $F_2^A/F_2^{\mathrm{D}}$. We also show that the possible nonlinear correction terms due to gluon fusion in the evolution equations do not change this conclusion. Some consequences for computation of RHIC multiplicities, which probe the region $x\gsim0.01$, are also discussed.

11 pages, 3 eps figures

References in corpus (8)

• Hadron production in nuclear collisions at RHIC and high density QCD
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at sqrt(s_nn) = 130 GeV
• Determination of nuclear parton distributions
• Charged particle densities from Au+Au collisions at sqrt{s_{NN}}=130 GeV
• Energy dependence of particle multiplicities in central Au+Au collisions
• Parton densities and dipole cross-sections at small x in large nuclei
• The improved nuclear parton distributions

Cited by in corpus (21)

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• Nuclear PDFs After the First Decade of LHC Data
• Evidences for two scales in hadrons
• A global reanalysis of nuclear parton distribution functions
• Hadrons and direct photon in pp and pA collisions at LHC and saturation effects
• Constraining the nuclear gluon distribution in $eA$ processes at RHIC
• Color fluctuation approximation for multiple interactions in leading twist theory of nuclear shadowing
• Nuclear effects on the longitudinal structure function at small x
• Large-$p_T$ Inclusive ${\pi }^0$ Production in Heavy-Ion Collisions at RHIC and LHC
• Deep Inelastic Scattering on an Extremal RN-AdS Black Hole
• High-p_T pi^0 suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Probing small-$x$ gluons by low-mass Drell-Yan pairs at colliders
• Parametrization of the nuclear structure function
• Deep Inelastic Scattering on a Nucleus using Holography
• DGLAP analyses of nPDF: constraints from data
• Approximation method for the nuclear structure functions at small $x$
• Reduced cross-section in Electron-Ion Colliders at small $x$
• EPPS21: A global QCD analysis of nuclear PDFs